Chemistry: Matter and Change

Chapter 12: States of Matter

Chapter Test Practice

1
Which of the following statements is true?

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A)particles of a gas never collide
B)particles of a gas collide with their container only.
C)particles of a gas collide with each other in elastic collisions.
D)particles of a gas collide with each other in inelastic collisions.
2
Explain what would happen to the column of mercury in the barometer as shown if the atmospheric pressure fell.

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A)As the pressure falls, the column of mercury will drop lower.
B)As the pressure falls, the column of mercury will remain unchanged.
C)As the pressure falls, the column of mercury will rise higher.
D)As the pressure falls, the density of the mercury will increase.
3
Which intermolecular force depends on the formation of temporary dipoles?

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A)dipole-dipole forces
B)dispersion forces
C)ionic bonding
D)hydrogen bonding
4
In water's hydrogen bonds, the attraction is between which atoms?

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A)hydrogen atoms in different molecules
B)hydrogen atoms in one molecule and oxygen atoms in another molecule.
C)hydrogen atoms in the same molecule
D)hydrogen atoms and oxygen atoms in the same molecule
5
Which of the following statements is false?

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A)Methane forms hydrogen bonds due to its four hydrogen atoms.
B)Ammonia is a gas at room temperature because nitrogen is less electronegative than water.
C)Water is a liquid at room temperature because of the strength of its hydrogen bonds.
D)Methane molecules are nonpolar.
6
In a classic demonstration, pepper floating on water runs away from a soapy finger. What has happened?

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A)Pepper is repelled by soap due to dipole forces between the molecules.
B)Soap on the finger breaks up the surface tension of the water.
C)Cohesive forces cause the water to stick to the pepper.
D)Adhesive forces cause the water at the surface to move away from the finger.
7
Which type of crystalline solid is most likely to be used in the filament of a light bulb?

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A)atomic solid
B)molecular solid
C)ionic solid
D)metallic solid
8
In what directions must energy be added to cause the indicated phase change?

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A)solid to liquid, liquid to gas, solid to gas
B)solid to liquid, gas to liquid, solid to gas
C)solid to liquid, liquid to gas, gas to solid
D)solid to gas, gas to liquid, liquid to solid
9
The boiling poing of a liquid is the temperature at which ________.

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A)vapor pressure is greater than atmospheric pressure
B)vapor pressure is equal to atmospheric pressure
C)vapor pressure is less than atmospheric pressure
D)vapor pressure is zero
10
Dry ice is solid carbon dioxide. What combination of factors can change dry ice into a liquid?

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A)Increase temperature and decrease pressure.
B)Decrease both temperature and pressure.
C)Decrease temperature and increase pressure.
D)Increase both temperature and pressure.
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